One byte transfer in burst mode

Question

Hi. I’m working on app, which utilizes SPI in DMA mode for communication between STM32F030K6 and Wiz850. I have registered the following functions: reg_wizchip_cs_cbfunc(SPI_Soft_nSS_On, SPI_Soft_nSS_Off); reg_wizchip_spiburst_cbfunc( SPI_DMA_Rx_Burst, SPI_DMA_Tx_Burst); Program works fine till the moment I try to use wizchip_getnetinfo() function. For some reason it calls WIZCHIP_READ function (what I believe it shouldn’t do if I registered SPI burst functions). uint8_t WIZCHIP_READ(uint32_t AddrSel) { uint8_t ret; uint8_t spi_data[3]; WIZCHIP_CRITICAL_ENTER(); WIZCHIP.CS._select(); AddrSel |= (W5500_SPI_READ | W5500_SPI_VDM_OP); if(!WIZCHIP.IF.SPI._read_burst || !WIZCHIP.IF.SPI._write_burst) // byte operation { WIZCHIP.IF.SPI._write_byte((AddrSel & 0x00FF0000) >> 16); WIZCHIP.IF.SPI._write_byte((AddrSel & 0x0000FF00) >> 8); WIZCHIP.IF.SPI._write_byte((AddrSel & 0x000000FF) >> 0); //ret = WIZCHIP.IF.SPI._read_byte(); } else // burst operation { spi_data[0] = (AddrSel & 0x00FF0000) >> 16; spi_data[1] = (AddrSel & 0x0000FF00) >> 8; spi_data[2] = (AddrSel & 0x000000FF) >> 0; WIZCHIP.IF.SPI._write_burst(spi_data, 3); } ret = WIZCHIP.IF.SPI._read_byte(); WIZCHIP.CS._deselect(); WIZCHIP_CRITICAL_EXIT(); return ret; } As far as I can see, it has an option for burst as well, but it does not return anything (since it reading byte to be returned) and just keep writing three bytes: 0x00 0x01 0x08 I tried to modify burst part to write/read four bytes and return one as following: uint8_t WIZCHIP_READ(uint32_t AddrSel) //This function is altered for SPI Burst operations { uint8_t ret; //uint8_t spi_data[3]; uint8_t spi_data[4]; WIZCHIP_CRITICAL_ENTER(); WIZCHIP.CS._select(); AddrSel |= (W5500_SPI_READ | W5500_SPI_VDM_OP); if(!WIZCHIP.IF.SPI._read_burst || !WIZCHIP.IF.SPI._write_burst) // byte operation { WIZCHIP.IF.SPI._write_byte((AddrSel & 0x00FF0000) >> 16); WIZCHIP.IF.SPI._write_byte((AddrSel & 0x0000FF00) >> 8); WIZCHIP.IF.SPI._write_byte((AddrSel & 0x000000FF) >> 0); ret = WIZCHIP.IF.SPI._read_byte(); } else // burst operation { spi_data[0] = (AddrSel & 0x00FF0000) >> 16; spi_data[1] = (AddrSel & 0x0000FF00) >> 8; spi_data[2] = (AddrSel & 0x000000FF) >> 0; WIZCHIP.IF.SPI._read_burst(spi_data, 4); ret = spi_data[3]; } //ret = WIZCHIP.IF.SPI._read_byte(); WIZCHIP.CS._deselect(); WIZCHIP_CRITICAL_EXIT(); return ret; } In this case I can have two UDP sockets open, but if I try to send out some data, using sendto() in main cycle, it returns SOCKERR_TIMEOUT for first time and SOCKERR_IPINVALID for all attemts after that. First, I wonder why WIZCHIP_READ is called if I haven’t registered reg_wizchip_spi_cbfunc(), and second if this function has burst operation section, how it is supposed to be returning value? Any ideas?

becky · Answer

Hello, GitHub GitHub - WIZnet-ioLibrary/W5x00_DMA_with_W5100S_EVB: This Project is base on... This Project is base on W5100S-EVB. but If you use the SPI of Arduino interface on W5100S-EVB, you can use the W5100S/W5100/W5200/W5500 when wizchip_conf.h modify - GitHub - WIZnet-ioLibrary/W5x00_... Please refer to the link above. This code is to control WIZnet CHIP through DMA communication using STM32F103. Considering that a Socket INVALID ERROR occurs, your code does not seem to send or receive data properly.